Good! "N" is supposed to go to north, yes! But for this antenna it does not matter... longer story below.
This is used when you do phase differential stuff. Which usually means L1/L2 stuff and specifically antenna calibration data for az/el. I cannot find any calibration data. http://www.ngs.noaa.gov/ANTCAL/Antennas.jsp?manu=AeroAntenna http://www.geopp.de/index.php?bereich=5&kategorie=34&artikel=62 However if you look at the AT antennas at NOAA with a spike radome - I think the base chokering is the same as ours. Just a different antenna element in say the AT2775-43. For that antenna it matters! I think the application for the AT575-90 was code differential dgps (marine DGPS) base stations. This service gives the users 1m:ish accuracy. Phase calibration is clearly <<10cm and not needed for basic code DGPS. -- Björn -------- Originalmeddelande -------- Från: "Mark C. Stephens" <ma...@non-stop.com.au> Datum: 2013-07-15 12:13 (GMT+01:00) Till: Discussion of precise time and frequency measurement <time-nuts@febo.com> Rubrik: Re: [time-nuts] Lecia L1 GPS chokering antenna voltage, Thank you, It is a AT575-90_G! Now, On the bottom, there is an arrow labelled N. I presume that is supposed to face north? I can't tell you how ideal this antenna is for my application, outstanding! Thank you again. -marki -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of b...@lysator.liu.se Sent: Monday, 15 July 2013 7:02 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Lecia L1 GPS chokering antenna voltage, Hi, Is the antenna identical to this? http://www.aeroantenna.com/PDF/AT575-90_G.pdf http://ebookbrowse.com/at575-90-g-pdf-d359926216 (alternate link) Do you have some pictures of the antenna? In particular the antenna element? Aeroantennas of this vintage is usually "RG" which according to the spec above 5-18VDC. I recall having seen 4.5V as lower level to. Modern antennas are usually good to 3.3 or lower. With vintage antennas this is much more uncertain. -- Björn > I have been trying to find a datasheet for my Leica Antenna. > > All that is marked on the antenna is part number 10147. > > I want to find out what voltage range the preamp works off. > > Anybody have any idea? > > > -marki > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
